Ducommun (NYSE: DCO) executive plans 2,500-share sale after prior 5,766-share disposal

Rhea-AI Filing Summary

Ducommun Inc. (DCO) received a Rule 144 notice stating that Stephen G. Oswald, identified as an officer/director, plans to sell 2,500 shares of common stock through Morgan Stanley Smith Barney Executive Financial Services on or after August 18, 2026. The notice indicates these are “Exercised Shares” acquired from the issuer for cash on August 17, 2026. It also reports that Oswald sold 5,766 shares of Ducommun common stock during the prior three months.

Key Figures

Shares to be sold: 2,500 shares Planned sale date: 08/18/2026 Shares exercised: 2,500 shares +3 more

6 metrics

Shares to be sold 2,500 shares Common stock planned to be sold under Rule 144 by Stephen G. Oswald

Planned sale date 08/18/2026 Approximate date of sale for the 2,500 shares of common stock

Shares exercised 2,500 shares Common shares described as “Exercised Shares” acquired from issuer for cash on 08/17/2026

Shares sold in past 3 months 5,766 shares Common shares sold by Stephen G. Oswald on 08/12/2026

Aggregate amount for past 3-month sales 1,159,804.38 Aggregate amount associated with 5,766 shares sold on 08/12/2026

Aggregate amount for planned sale 509,882.25 Amount listed alongside the 2,500 shares to be sold under Rule 144

Key Terms

Rule 144, Exercised Shares, aggregate amount, securities are To Be Sold

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Exercised Shares financial

"Common | 08/17/2026 | Exercised Shares | Issuer |"

aggregate amount financial

"08/12/2026 | 5766 | 1159804.38"

securities are To Be Sold regulatory

"Name of Person for Whose Account the Securities are To Be Sold"

FAQ

What does Ducommun Inc. (DCO)’s latest Rule 144 filing disclose?

The filing discloses that Stephen G. Oswald, an officer/director, has filed a Rule 144 notice to sell 2,500 shares of Ducommun common stock, consisting of exercised shares acquired from the issuer for cash on August 17, 2026.

How many Ducommun (DCO) shares does Stephen Oswald plan to sell under this Rule 144 notice?

Stephen G. Oswald plans to sell 2,500 shares of Ducommun common stock. These shares are described as “Exercised Shares” and are to be sold through Morgan Stanley Smith Barney Executive Financial Services on or after August 18, 2026.

What prior sales of Ducommun (DCO) stock are reported for Stephen Oswald?

The notice reports that Stephen G. Oswald sold 5,766 shares of Ducommun common stock on August 12, 2026. The aggregate amount associated with that sale is listed as 1,159,804.38 for the shares sold during the past three months.

How were the Ducommun (DCO) shares in the planned Rule 144 sale acquired?

The 2,500 shares in the planned Rule 144 sale are identified as “Exercised Shares”. They were acquired from the issuer, Ducommun Inc., for cash on August 17, 2026, immediately before the planned sale date in the filing.

Which broker is named in Ducommun (DCO)’s Rule 144 notice for Stephen Oswald’s sale?

The planned sale will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services. The broker’s address is listed as 1 New York Plaza, 8th Floor, New York, NY 10004, as part of the Rule 144 securities information.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/18/2026 - 04:06 PM Accepted by SEC EDGAR 08/18/2026 - 04:06 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001695904
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	DUCOMMUN INCORPORATED
SEC File Number	001-08174
Address of Issuer	600 Anton Boulevard, Suite 1100 Costa Mesa CALIFORNIA 92626-7100
Phone	(657) 335-3665
Name of Person for Whose Account the Securities are To Be Sold	STEPHEN OSWALD
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	2500	509882.25	15099779	08/18/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/17/2026	Exercised Shares	Issuer			2500	08/17/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
STEPHEN OSWALD 600 Anton Boulevard, Suite 1100 Costa Mesa CA 92626-7100	Common	08/12/2026	5766	1159804.38

144: Remarks and Signature

Remarks
Date of Notice	08/18/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Stephen G Oswald
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)